Kazan Yamaoka traversed Japan eliminating samurai in order to purify what it meant to be one. Ridiculed as Oni Yamaoka, Kazan began falling deeper into his menacing, demonic title, until the people of Japan could take it no more. The laymen ganged together, and overpowered Kazan, beating and piercing him with their tools. The Entity took the lifeless husk that once was Oni Yamaoka, and raised him to the monster he once embodied.